How do I best maintain a large indoor "rain" fountain?

Question

This large fountain contains many gallons of water that produces a
rain effect. It is inside my home, in the entry hall. I turn it off at midnight and restart in the morning.

After about a week, the water becomes murky and I have to
totally drain and change the water...very time consuming!
I thought of adding pond water treatment to the water, but am concerned that the chemicals would get in the air inside my home.
This fountain is beautiful, but I would like to keep the water fresh longer.
Would adding essential oil, such as peppermint, help?

Answer 1

No peppermint. Then you would have a stinkey peppermint smelling fountain. Treat it like you would a swimming pool. Put the pool chemicals in and test it every so often.